bluez5: media-source: transport not started is not an error
Transport not being started should not be considered IO error in produce_buffer.
See #3167 (closed)
bluez5: media-sink: don't fail A2DP duplex sink if remote idles
Don't emit node error for A2DP duplex sink channel, or when BAP server. These can occur under normal conditions (remote side suspends transport), and are not errors.